Thanks sleeperbusa for all that great first hand info.
I didn't realise that the 2 brothers exhaust was cheap. It is I just heard them on an 08 Busa and they were soooo throaty deep,like a growl that I liked them so much and they have this baffle cone you can put in or take out to fine tune the sound. I wish I could hear some other exhaust sounds somewhare other than youtube because many of the videos there were recorded poorly and you just can't tell what it really sounds like.